The composite system of methyl MQ silicone resin and silicone oil solvent has shown excellent application value in the mold release industry. Through the synergistic effect of molecular structure design and solvent, the semi-permanent mold release effect of high-adhesion resin is realized, while meeting the dual needs of environmental protection and performance.


1. The core advantages of mold release performance
Methyl MQ silicone resin uses the Si-O bond as the skeleton to form a three-dimensional mesh structure, and its M/Q value (the ratio of monofunctional groups to tetrafunctional groups) directly affects the release performance.When the M/Q value is controlled from 0.7:1 to 1:1, the resin has both flexibility and film-forming strength, and a dense isolation layer is formed after mixing with silicone oil.For example, in the production of polyurethane soles, adding a silicone oil release agent with 10% methyl MQ silicone resin can achieve continuous mold release more than 15 times, which is 300% more efficient than the pure silicone oil system, and there is no residue on the mold surface, and the product's edge and corner integrity rate is 99.2%.


2. The synergistic effect of the solvent system
The choice of solvent directly affects the construction performance and environmental protection indicators of the mold release agent.Although the traditional xylene solvent is highly soluble, the VOC content is as high as 700g/L, which is gradually replaced by dearomatic solvent oil.Taking D60 solvent oil as an example, it reduces the benzene content to less than 0.1% through the hydrodesulfurization process. When used with methyl MQ silicone resin, it can form a non-hazardous chemical formula with a flash point>65℃ to meet the needs of high temperature working conditions such as die casting of auto parts.For the release of high-end electronic components, isoalkane solvents (such as Isopar L) have become the first choice in dust-free workshops due to their colorless and odorless properties. After they are combined with vinyl MQ silicone resin, the curing temperature of the release agent can be as low as 80℃ to avoid deformation of thermal materials.


3. Differentiated solutions for industry applications
Polyurethane field: Using methyl vinyl MQ silicone resin with M/Q=1.2:1 and 120# solvent oil, a mold release agent with a temperature resistance of 220℃ can be prepared to solve the problem of mold adhesion in the production of rigid foam insulation panels.
Epoxy resin composite material: By introducing hydrogen-containing MQ silicone resin, a cross-networking network is formed in the mold release agent, which extends the service life of the mold from 200 times to 800 times, and significantly reduces the manufacturing cost of aerospace components.
Tire vulcanization process: The water-based MQ silicone resin emulsion (50% solid content) is combined with silicone oil to achieve the instantaneous separation of the vulcanized rubber from the mold, reduce the scrap rate by 1.8 percentage points, and save more than 10 million yuan in annual production costs.
Fourth, the trend of technological development
With the upgrading of environmental protection regulations, mold release agents are developing in the direction of high flash point and low VOC.The breakthrough in the process of coal-to-Fischer-tropsch synthesis of isoalkanes has reduced the cost of solvents by 40%, and promoted the penetration rate of methyl MQ silicone resin mold release agent in the field of 3C electronics to 65%.At the same time, the research and development of nano-scale MQ silicone resin (particle size <50nm) can further improve the lubricity of the mold release agent, and it is expected to achieve industrial application in 2026.